

.top {
	height: 50px;

	/* 背景颜色 */
	background-color: red;
}

.logo {
	/* 向左浮动 */
	float: left;

	width: 300px;
	height: 50px;

	border: 1px solid black;

	/*背景图片
	
		background-repeat: no-repeat;
		no-repeat 不重复
	*/
	background: url(../img/logo.png) no-repeat;
	background-position: left center;
}

.search {
	float: right;
}